diff --git a/be/app/Http/Controllers/MasterTaskController.php b/be/app/Http/Controllers/MasterTaskController.php
index 26e129d..2ac4ac9 100644
--- a/be/app/Http/Controllers/MasterTaskController.php
+++ b/be/app/Http/Controllers/MasterTaskController.php
@@ -134,14 +134,25 @@ class MasterTaskController extends Controller
         $mastertask = MasterTask::find($id);
 
         // ak je Master task v stave ukončený, nedovolime update. vynimkou je iba znovuotvorenie mastertasku
-        if ($mastertask->is_finished == 1 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 1) {
+        if ($mastertask->is_finished == 1 && (!isset($request->all()['data']['is_finished']) || $request->all()['data']['is_finished'] == 1)) {
             return response()->json([
                 'message' => 'Cannot update mastertask that is finished.',
             ], 400);
         }
 
+        // znovuotvorenie mastertasku
+        if ($mastertask->is_finished == 1 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 0) {
+            $mastertask->is_finished = 0;
+            $mastertask->save();
+
+            return response()->json([
+                'message' => 'Master Task opened successfully',
+                'mastertask' => $mastertask
+            ]);
+        }
+
         // ak chcem ukoncit mastertask, ktory nema ani jeden subtask, ktory ma natrackovany cas, tak to nedovolim
-        if (isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 1) {
+        if ($mastertask->is_finished == 0 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 1) {
             $atLeastOneSubtaskHasTimesheet = false;
 
             foreach ($mastertask->subtasks as $subtask) {
@@ -154,10 +165,7 @@ class MasterTaskController extends Controller
                 return response()->json([
                     'message' => 'Finishing mastertask is only possible where at least one subtask contains timesheet',
                 ], 400);
-        }
 
-        // ukoncenie master tasku
-        if ($mastertask->is_finished == 0 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 1) {
             $mastertask->is_finished = 1;
             $mastertask->save();
 
@@ -167,6 +175,8 @@ class MasterTaskController extends Controller
             ]);
         }
 
+
+
         // validacia na max 50MB size pre attachmenty. neslo dat do klasickeho laravel validation, tak je to separe
         if ($files = $request->file('data')) {
             foreach ( $files['files'] as $file ) {